Common Conversion Factors in Medical Dosage Calculations PDF

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Common Conversion Factors in Medical Dosage Calculations



1 teaspoon (tsp) = 5 milliliters (mL)



3 teaspoon (tsp) = 1 tablespoon (Tbsp)



1 tablespoon (Tbsp) = 15 milliliters (ml)



30 milliliters (mL) = 1 ounce (oz)



2 tablespoons (Tbsp) = 1 ounce (oz)



1000 milliliters (mL) = 1 Liter (L)

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1000 micrograms (mcg) = 1 milligram (mg)



1000 milligrams (mg) = 1 Gram (G)



1000 Grams (G) = 1 Kilogram (Kg)



2.2 pounds (lb) = 1 Kilogram (Kg)



2.54 centimeters = 1 inch (We use 2.5 for math exam)



Cup (standard measuring cup)

1 cup = 8 oz

240 mL



Pint

1 pt = 2 cups (16 oz)

480 mL



Quart

1 qt = 4 cups = 2 pt = 32 oz

960 mL



Pound

1 lb = 16 oz



Foot

1 ft = 12 inches



Yard

1 yd = 3 ft = 36 inches



Gr I = 60 mg

(This translates as 1 grain = 60 mg)

 Must have a leading zero with a decimal, so 0.5 or 0.2  No trailing zero, so it is NOT 0.80



Converting lb to kg and kg to lb lb = kg × 2.2 kg = lb ÷ 2.2



Converting mL to L and L to mL

Correct way is 0.8

mL = L × 1,000 L = mL ÷ 1,000



Converting mg to g, g to mg, mg to mcg, and mcg to mg mg = g × 1,000 g = mg ÷ 1,000 mcg = mg × 1,000 mg = mcg ÷ 1,000

Must understand military time Military time is easy to use. Simply write the four-digit number without a colon and omit the AM and PM. The first two digits reflect the hour. The last two digits reflect the minutes. AM

PM

12 AM = 0000 12 PM = 1200 (midnight) 1 AM = 0100 2 AM = 0200 3 AM = 0300 4 AM = 0400 5 AM = 0500 6 AM = 0600 7 AM = 0700 8 AM = 0800 9 AM = 0900 10 AM = 1000 11 AM = 1100

(noon) 1 PM = 1300 2 PM = 1400 3 PM = 1500 4 PM = 1600 5 PM = 1700 6 PM = 1800 7 PM = 1900 8 PM = 2000 9 PM = 2100 10 PM = 2200 11 PM = 2300

Abbreviations BID = Two times a day TID = Three times a day QID = 4 times a day p.o. = Oral route IV = Intravenous route IM = Intramuscular route ID = Intradermal route NPO = nothing by mouth SL = Sublingual SQ = Subcutaneous HS = Hours sleep or at bedtime AM = In the morning PM = In the evening a.c. = before meals p. c. = after meals gtts = drops

PRN = as needed q.h. = every hour troche = lozenge...